Modular Arithmetic

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Across
  1. 3. The product of multiplying a number by a whole number
  2. 4. The number of times a letter is commonly used in language
  3. 6. After dividing one number by another,any amount is left that does not divide evenly
  4. 7. A simple substitution cipher developed by Julius Caesar
Down
  1. 1. A substitution cipher using a keyword and tabula recta
  2. 2. The number you go to before starting over in modular arithmetic, also called a "mod"
  3. 5. Any of the numbers or symbols in mathematics that when multiplied together form a product
  4. 7. codes for writing secret messages